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LM21215AMHE-1

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by adom

Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM21215AMHE-1

Texas Instruments · DC-DC Converters · HTSSOP-20-EP

LM21215AMHE-1 from Texas Instruments, in a HTSSOP-20-EP. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 SYNC input Frequency synchronization input: applying a clock signal forces the device to switch at the clock frequency, and the frequency defaults to 500 kHz if the pin is left unconnected.
2 SS/TRK input Soft-start control pin where an internal 2-µA current source charges an external capacitor to AGND to set the output voltage ramp rate at startup, and it can also configure the tracking feature.
3 EN input Active high precision enable input that can be left open because an internal pullup current source pulls it high.
4 AVIN power_in Analog input voltage supply that generates the internal bias, and PVIN should be connected to AVIN through a low-pass RC filter to minimize input rail ripple and noise on the analog control circuitry.
5 PVIN power_in Input voltage to the internal power switches, which must be connected together at the device with low-ESR input capacitance placed as close as possible to these pins.
6 PVIN power_in Input voltage to the internal power switches, which must be connected together at the device with low-ESR input capacitance placed as close as possible to these pins.
7 PVIN power_in Input voltage to the internal power switches, which must be connected together at the device with low-ESR input capacitance placed as close as possible to these pins.
8 PGND power_in Power ground pin for the internal power switches, to be connected with pins 9 and 10 at the device.
9 PGND power_in Power ground pin for the internal power switches, to be connected with pins 8 and 10 at the device.
10 PGND power_in Power ground pin for the internal power switches, to be connected with pins 8 and 9 at the device.
11 SW power_out Switch node pin that must be tied together locally with the other SW pins and connected to the filter inductor.
12 SW power_out Switch node pin that must be tied together locally with the other SW pins and connected to the filter inductor.
13 SW power_out Switch node pin that must be tied together locally with the other SW pins and connected to the filter inductor.
14 SW power_out Switch node pin that must be tied together locally with the other SW pins and connected to the filter inductor.
15 SW power_out Switch node pin that must be tied together locally with the other SW pins and connected to the filter inductor.
16 SW power_out Switch node pin that must be tied together locally with the other SW pins and connected to the filter inductor.
17 PGOOD output Open-drain power good indicator output.
18 COMP output Compensation pin connected to the output of the voltage loop error amplifier.
19 FB input Feedback pin connected to the inverting input of the voltage loop error amplifier.
20 AGND power_in Quiet analog ground for the internal reference and bias circuitry.
21 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package HTSSOP-20-EP
Category Power Supply Chip
Pins 21

CAD (KiCad official)

  • Symbol: LM21215AMHE-1
  • Footprint: Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm
  • 3D model: HTSSOP-20-EP, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.2 mm nominal TSSOP height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: lm21215amhe-1-etched.step / lm21215amhe-1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm21215amhe-1.step / lm21215amhe-1.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (41 pp, sha256 1a78c465ce28785b, retrieved 2026-10-10, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF